Weeping Yaupon has a naturally thin and gangly look in youth, but it becomes more dense with age. The good new is that this tree takes well to heavy pruning, but pruning is not required. So, if you want to prune the branches back by one-third to encourage additional growth, go ahead and prune. Wait until this winter to prune and expect your Yaupon to produce 2-3 new stems wherever you make a pruning cut. Best wishes with your landscape!